The printer port is the device name (typically, /dev/term/a,
/dev/term/b, or /dev/bpp0) corresponding to the port to which a
locally attached printer is physically connected. You usually connect
printer cables to a serial port (/dev/term/a or /dev/term/b, for
example) but in some cases you can use a parallel port (/dev/bpp0, for
example). See the printer vendor's documentation and your system's
installation documentation for information about switch settings and
cabling requirements.
Note that the device name must exist and have write permissions
set.